I find Rbianconi's description to be spot on as to the differences that the Multiwave makes. I use the PS2 setting, as I had transformer buzz problems running equipment at 90 hz and I have an air pump (Forsell transport) plugged in through the P300. I have my digital front end--transport, upsampler, DAC and DVD transport--plugged in. The upgrade is very simple to install; I'm a motor moron and could do it easily. I don't notice any increase in heat since installing the upgrade. I think the upgrade is a substantial improvement in a very good product.
